Secret Temple is a hidden room on Hydra Island that plays a major role in both the Yama Puzzle and Tushita Puzzle. It is one of the most important progression locations for players working toward Cursed Dual Katana.

The temple is hidden inside the waterfall on Hydra Island. After entering, players will find a breakable wall that can only be destroyed using abilities with Destructible Physics, similar to the gate in Upper Skylands. Breaking this wall reveals the temple’s inner chamber.

Inside, players encounter five Ghosts guarding the room. These enemies can be defeated normally, though players using an Elemental fruit can ignore much of the threat thanks to Elemental immunity. At the center of the room, players can attempt to pull Yama, making this the key location for that sword’s unlock process.

After defeating all five Ghosts while Rip_Indra is alive, players can enter the right-side passage and access the black door of the small castle, which begins the Tushita Puzzle.